What Is Importer Security Filing

An Importer Security Filing (ISF) is advance shipment information sent to U.S. Customs and Border Protection (CBP) for goods arriving in the United States by vessel. It helps CBP review ocean cargo before it reaches the country. You may also hear it called the 10+2 rule.

The key point is scope: ISF is a CBP requirement for ocean imports, not a general filing rule for every shipment entering the United States. Air, truck, and rail shipments may have different requirements.

What Is Importer Security Filing (ISF)?

An ISF gives CBP information about an ocean shipment before the cargo arrives in the United States. The filing covers 12 details tied to the shipment, the goods, and the parties involved in moving them.

The ISF is separate from the entry paperwork used to clear imported goods. It is an advance security filing. That means the information is provided before the shipment arrives, so CBP has time to review the cargo and assess possible security concerns.

In practical terms, an ISF answers questions such as:

• Who is bringing the goods into the United States?
• What goods are being shipped?
• Who made or supplied them?
• Where were they loaded?
• Where are they going?
• Which carrier is transporting them?

The exact information needed depends on the shipment and the roles of the businesses involved. The importer must make sure the filing is submitted on time and that the information is accurate and complete.

Why ISF Is Called the 10+2 Rule

The name 10+2 describes the basic structure of the filing:

• 10 pieces of information are supplied by the importer or the party responsible for the import.
• 2 more pieces of information come from the ocean carrier.

Together, those details make up the 12 shipment details documented through the ISF.

The nickname can make the process sound simpler than it is. The real questions for an import team are more useful:

1. Who is responsible for sending the filing?
2. What shipment information must be reported?
3. When must CBP receive it?
4. What bond supports the filing?
5. What happens if the information is late, wrong, or incomplete?

Those questions matter more than memorizing the nickname. A company can know that a shipment is subject to “10+2” and still miss the filing if it has not assigned responsibility or collected the required data.

Which Shipments Require an ISF

The ISF applies to cargo imported into the United States by vessel. That includes ocean shipments moving into U.S. ports.

This means an import team should first identify the transport mode. If the goods are arriving by ocean vessel, the team should check whether an ISF is required before the shipment moves. If the goods are arriving by air, truck, or rail, do not assume the ocean ISF process applies in the same way.

That distinction is easy to miss when a company uses several transport methods. A business might have one supplier shipping by ocean and another sending goods by air. The paperwork and timing should be reviewed separately for each movement.

For ocean cargo, the ISF is tied to the import shipment rather than being a general registration for the importer. Each shipment needs the right information connected to its own cargo, parties, and movement.

What Information the ISF Covers

An ISF documents 12 details about an ocean shipment entering the United States. The “10+2” name reflects the split between importer-provided information and carrier-provided information.

The importer-side information generally connects the cargo to the commercial parties and the supply chain. Depending on the shipment, that can involve details about:

• The importer or party bringing the goods into the country
• The seller or supplier
• The buyer or owner
• The manufacturer or supplier of the goods
• The location where the goods were loaded
• The planned destination
• The party receiving the cargo
• The goods themselves and how they are identified

The two carrier-related details come from the ocean carrier’s shipment records. They are part of the same advance security picture, even though the importer may not personally enter every carrier detail.

The exact data fields and filing instructions should be checked against current CBP requirements. The important operational lesson is that the ISF cannot be completed well from a vague purchase order alone. Import teams often need information from suppliers, logistics providers, carriers, and customs brokers.

Before the shipment moves, decide who will collect each detail and who will check it. A wrong supplier name, incomplete cargo description, or missing destination detail can create problems even when the filing was submitted before arrival.

Who Is Responsible for Filing the ISF

The ISF importer is generally the party causing the goods to arrive in the United States. That party carries the responsibility for the filing.

An importer may ask a customs broker, freight forwarder, or another service provider to submit the information. That can make the process easier, especially for companies handling many shipments. But handing off the electronic submission does not remove the importer’s need to provide correct information or oversee the process.

A useful internal split looks like this:

• The importer supplies or confirms the shipment data.
• The broker or filing service may prepare and transmit the filing.
• The ocean carrier supplies the carrier-side information.
• The importer’s team tracks whether the filing was accepted and updates it when required.

Put the responsibility in writing. Your purchase, logistics, and customs teams should know who owns the deadline, who contacts the supplier for missing information, and who checks the submission status.

If nobody clearly owns the task, the filing can fall between the importer, broker, and carrier. That is especially risky when a supplier changes the loading location, routing, or other shipment details after the initial information was collected.

When the Importer Security Filing Must Be Submitted

The ISF must be submitted before cargo arriving by vessel can be imported into the United States. It is an advance filing, not something to leave until the shipment reaches the port.

The supplied information does not establish one exact cutoff time or a current deadline that should be used for every shipment. Timing can depend on the current CBP rule and the type of cargo or filing involved. For that reason, importers should confirm the current deadline before publishing an internal procedure or scheduling a shipment.

A practical workflow is to start the process as soon as the ocean booking and shipment details are available. Waiting until the vessel is close to the U.S. port leaves less time to:

• Get missing information from the supplier
• Correct a wrong party or cargo detail
• Coordinate with a broker
• Resolve an electronic filing problem
• Update information that changed after the original submission

Do not treat the carrier’s booking confirmation as proof that the ISF has been filed. Ask for confirmation from the party handling the submission and keep that record with the shipment file.

ISF Bonds, Accuracy, and Completeness

The ISF importer is required to post a bond that secures the timely, accurate, and complete filing of the ISF.

A bond is a financial guarantee tied to the importer’s obligations. It does not replace the filing. It supports the importer’s promise to meet the filing rules.

This creates three separate checks for every shipment:

1. Timely: Was the filing submitted by the required deadline?
2. Accurate: Does the information match the actual shipment and known supply-chain details?
3. Complete: Were all required details provided?

A filing can fail in more than one way. Submitting something is not enough if key information is missing or incorrect. On the other hand, information may change after a filing is sent. Import teams should have a process for reviewing updates and correcting the filing when current rules require it.

Keep supplier and shipping records that support the information you submit. Those records can help your team answer questions, spot mismatches, and explain why a particular detail was reported.

What Can Happen If the ISF Is Not Filed Properly

Failure to follow the ISF rule could lead to monetary penalties. Problems may include a late filing, missing information, inaccurate information, or a filing that is not properly completed.

The supplied research does not establish a penalty amount, so this article does not assign a dollar figure. Do not build your compliance budget around an unverified number. Check the current CBP rules or ask a qualified customs professional about the possible exposure for your shipment type and situation.

The financial impact may also extend beyond the penalty itself. A filing problem can create extra work for the importer, broker, carrier, and warehouse team. It may force people to chase documents or correct records while the shipment is moving.

That is why a simple control system helps:

• Assign one owner for each ISF.
• Set an internal deadline before the official deadline.
• Check the 12 required details for gaps.
• Confirm the filing was transmitted.
• Save the filing record and related shipment documents.
• Review changes to routing, suppliers, loading locations, and cargo details.

The goal is not merely to send a form. It is to create a reliable record that matches the shipment.

ISF Forms, Requirements, and Filing Costs

Is there an Importer Security Filing form?

People often ask for an Importer Security Filing form, but the ISF is best understood as an electronic filing of required shipment information. The party responsible for the shipment may use a customs broker, filing platform, or other approved process to submit it.

Do not assume that a blank form alone solves the compliance problem. The work is in collecting the right information, sending it through the correct process, and checking that the filing is timely, accurate, and complete.

What are the main Importer Security Filing requirements?

The core requirements are straightforward:

• The cargo must be arriving in the United States by vessel.
• The required ISF information must be submitted to CBP.
• The filing must be made before the cargo can be imported into the United States.
• The importer must support the filing with the required bond.
• The information must be timely, accurate, and complete.
• Any needed updates should be handled under current CBP instructions.

The exact deadline and data-field instructions should be verified before you create a company checklist. The research available for this article does not establish every current field or a single cutoff that applies in all situations.

How much does it cost to file an ISF?

There is no standard ISF filing fee established in the supplied information. A broker, freight forwarder, carrier, or filing service may charge for handling the submission, but the amount is not confirmed here.

Ask the provider to separate the ISF service fee from other import charges. Also ask whether corrections, late handling, or additional shipments cost extra. Get the fee in writing before the shipment is booked.

Before shipping, verify the current ISF timing, filing requirements, bond obligations, and any service fees with CBP or a qualified customs professional.